Effect of Carbon Black on Flameless Atomic Absorption Spectrophotometry of Molybdenum and Van adium

Abstract

We have previously reported the elimination of interferences and deoxidation effects with carbon black in flame atomic absorption spectrophotometry of metals. This report deals with the enhancing of absorbance and atomizing effect in 19a m eless atomic absorption spectrophotometry of molybdenum and vanadium by the addition of carbon black. By dispersing carbon black in the sample solution, the absorption, curves of molybdenum and vanadium became sharp. The absorbance was about 6 times for molybdenum and 1.6 times for vanadium higher than without carbon black. Further, the life of the graphic cuvette was increased by the addition of carbon black. It appears that the enhancement of absorbance is due to the deoxidation effect of carbon black to the formation of oxide, and the increasing of the atomization efficiency.